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AviationWeather vs US Weather

Same instrument, two spec sheets — measured, not claimed.

APIAviationWeatherNEW—US WeatherNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useyesyes
Data licensePublic domain (U.S. Government / NOAA)U.S. Government work / public domain
Free tierFree, no keyFree (US Government public data)
Rate limitUnpublished (NWS requests reasonable use)Unpublished (asks for a User-Agent identifying your app)
In directory since2026-07-052026-07-05
operationalpartialdownno data

AviationWeather vs US Weather: common questions

Which is more reliable, AviationWeather or US Weather?

On our scheduled checks, US Weather leads on measured uptime — AviationWeather at —% versus US Weather at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do AviationWeather and US Weather need an API key?

Neither needs a paid key — AviationWeather is callable with no signup, and US Weather is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call AviationWeather and US Weather from the browser?

Only US Weather is browser-friendly — it returns CORS headers over HTTPS. AviationWeather needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are AviationWeather and US Weather free for commercial use?

AviationWeather allows commercial use on its free tier, and US Weather allows commercial use on its free tier. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.